How to Fix Microsoft Teams Error Code CAA5004B?

When using Microsoft Teams, you can come across the CAA5004B Error Code which prevents you from logging into your account and entering the chat lobby. This error is caused by suspicious activities in your Account, a corrupted cache, and incorrect organization email. This causes problems with the built-in contemporary authentication of Microsoft Teams.

In this guide, we will show you how to fix the Microsoft Teams Error Code: CAA5004B.

Workaround: Sign-In from the Web

A reason why you are facing this error is that your Microsoft Teams Application is not working properly. Therefore, as a workaround, you can simply Sign-In from the Web which is an alternate method to using the Teams Lobby.  Follow the steps below, as we have listed how you can sin-in into Teams using the Web:

1. Open the Official Microsoft Teams Website.
2. Sign-In to the Account by clicking on the Sign-In option.

   

3. Fill out the Missing Infirmation Form (If any).
4. To open the Teams Account on the Web, click on the “Use the web app instead” option.

   

5. Click on the Chat option on the left side of the panel and Click on “Find and Invite people.” 

   

1. Reconnect your Organization Email

One of the main reasons why you are facing this error is because of a corrupted Organization Email. Having a corrupted organization email will interfere with your Microsoft Account Sign-in and will lead to the Microsoft Teams CAA5004B Error. Therefore, you must disconnect and reconnect the Email you are signed into on your Account. Follow the steps below to see how you can reconnect your Organization Email:

1. Right-Click on the Windows Start Menu and Select the “Task Manager” option.

   

2. Open the “Process” Tab and find the Microsoft Teams Application.
3. Exit the application by right-clicking on it and clicking on the “End Task” option. 

   

4. Open the Windows Settings by pressing the Win + I keys together.
5. Now, navigate to Account  > Access work or school. 
6. Disconnect the Company Email you are signed into.
7. Confirm the actions by clicking YES on the pop-up prompt. 
8. To reconnect the email, click on the “Connect” option on the Access work or school Window. 

   

9. Lastly, restart your Microsft Teams to fix the Error. 

2. Clear Microsoft Teams Cache

Another reason for the occurrence of this error is linked to a corrupted Teams cache which prevents the application from working properly. Therefore, make sure to get rid of the corrupted cache from the Microsoft Teams folder and get access to your account. Following the steps listed below, you will see how to clear the Microsoft Team Cache:

1. Open the Run Command by pressing the Win + R keys together.
2. Open the Teams File directory by typing the following command into the search bar and clicking OK:

   %appdata%\Microsoft\Teams

3. Now, delete the Microsoft Teams Cache by deleting the following folders (additional folders added as well):

   \%appdata%\Microsoft\teams\application cache\cache
   \%appdata%\Microsoft\teams\blob_storage
   \%appdata%\Microsoft\teams\databases
   \%appdata%\Microsoft\teams\GPUCache
   \%appdata%\Microsoft\teams\IndexedDB
   \%appdata%\Microsoft\teams\Local Storage
   \%appdata%\Microsoft\teams\tmp
   \%AppData%\Microsoft\teams\cache

3. Turn off the VPN Proxy

VPN also interferes with the Sign-in process of Microsoft Team and as a result, causes the Sign-in error. Below we have given steps to turn off the VPN Proxy on your Windows:

1. Open the Windows Settings by pressing the Win + I keys together.
2. Navigate to Network and Internet > VPN. 
3. Click on the VPN you are using, and open “Advanced Options.”
4. Scroll down and turn off the “use a proxy server” toggle button under “Manual Configuration.”

   

5. Open the Microsoft Teams and Sign-in into your Account. 

4. Remove Generic Windows Credentials

Windows Credentials include several types of data which can cause the error to occur when it is corrupted. Since most users don’t require this data, therefore, you must get rid of it by clearing the Generic Windows Credentials. Below we listed the steps to clear the Windows Credentials:

(Disclaimer: You must close your Microsoft Teams Window before doing this method)

1. Open the Run command by pressing the Win + R keys together.
2. Open the Control Panel by typing “control panel” in the search box and clicking OK. 

   

3. Type “Credentials” in the search box in the top right corner. 
4. Now open the Windows Credentials by navigating to Credential Manager > Windows Credential. 
5. Remove all the Windows Credentials by clicking the drop-down arrow of all Generic Credentials and clicking the “Remove” option. 

   

6. Once all the Generic Windows Credentials are removed, you can Sign-In into your account and enter the Microsoft Teams lobby. 

5. Reinstall the Microsoft Teams App

If you are still facing the error, as a last resort, you must Reinstall the Teams App from your system. Below you will see how to Reinstall the Microsoft Team App on your Device:

1. Open the Run command by pressing the Win + R keys together.
2. Open the Control Panel by typing “control panel” in the search box and clicking OK. 

   

3. Click on the “Uninstall a program” option under “Programs.”

   

4. Uninstall the Teams Windows App by Right-clicking on it and selecting the “Uninstall” option.
5. Open the Official Microsoft Team Website.
6. Download the Teams Windows App by clicking on the “Download Now” option.

   

7. Select the Directory where you prefer to Download the Teams exe. file.
8. Open the Browser’s Download page by clicking on the three dots in the top-right corner and clicking on the “Downloads” option. 

   

9. Open the exe. file in the directory by clicking on the “Show in Folder” option.

   

10. Install the Team exe. file on your system by right-clicking on it and clicking on the “Open” option.

    

11. Initialize the Installation process by clicking on the “Run” option. 

    

12. After installing the application, sign in from your Microsoft Account and Enter the lobby.